Cutting-off saw.



Patented Sept. 14, 1915.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAFH CO-IWMH G. GORTON.

CUTTING-OFF SAW. APPLICATION FILED AUG. 11. 1909.

Patented Sept. 14, 1915.

2 SHEETS-SHEET Z.

COLUMBIA PLANOCIRAPH {SO-,WASHINOTON. D. c.

reruns prion 'enonen consort, or ims, W sconsin.

CUTTING-OFF sew.

1,153,682. Specification of Letters Patent. p t t m, 1915 Applicationfiled August 11, 1909. Serial No. 512,337.

7 To all whom it may concern:

Be it known that I, GEO GE Gorgon, a citizen of the United States, resding at Racine, Racine county, State of Vhsconsm,

ets in theperiphery therebf, have been used in i tti s'efi e l e deth hasher su h saws are slow in action and expensive to operate and maintainbecause of the center drive and the tendency of such saws to vibrate orchatter and snake or deflect latand projecting from the blade carryingdrum.-

have invented certain new and useful lmorally, and thereby shake theinserted teeth provements in Cutting-0d Saws; and I do loose and fromthe blade. in these old cenhereby declare the following to be a full,ter driven saws there is a short leverage on clear, and exactdescription of the invention, the work, and the act of wedging up onesuch as will enable others skilled in the art tooth in the periphery ofthe blade tends to to which it appertains to make and use the loosen theother teeth therein. This old same. V i type of saw cannot operate at aspeed any- This invention relates to certain improve- Where near thecapacity of the modern ments in metal cutting devices or more perhighduty steel cutters, and hence there ticularly to what are known in theart as is great inefficiency in the operation thereof. cutting oif sawsor tools; and the objects and lieferring to the accompanying drawings:nature of the invention will be readily un- Figure 1 is an elevation ofmy improved derstood by those skilled in" the art in the metal stockcutter showing the same fastened light of the following description ofthe acto its supporting and driving drum and companying drawingsillustrating what 1 showing the driving gear on the drum, the nowconsider my preferred embodiment. gear driving pinion being shown, thework The object of my invention is to provide being indicated by dottedlines. Fig.2, is a a rotary drive whereby 5 high speed or longitudinalsection taken diametrically high duty steel cutters can be driven tothrough the drum and cutter disk. Fig. 3,

heir full capacity for the rapid and ecois a plan view of a portion ofthe disk, on nomical severing of large, as well as small, an enlargedscale, certain of the insertible hard, as well as soft, metal bars. Tothis cutting tools or blades being removed and 7 end, I arrangerenewable or removable cutanother being partially broken away. tersaround and projecting into the central In the drawings, the cutter diskis indiwork receiving opening of a highspeed cated by 1, andthis disk isformed flat with rotary carrier,blade or drum adapted to be a centralcircular opening 2, to receive, and carried by a suitable feed carriageand havof greater diameter than, the work or stock ing an exteriordriving gear orwheel of relto be cut Off; the work or stock beingindiatively large diameter. 7 cated by 3. This cutter disk is composedof To thebest of my knowledge and informastrong comparatively heavymetal, such as tion no means have heretofore been provided steel. Forinstance, I have with good rewhereby highduty cutters could be operatedsults employed cutter blades or disks comto even approximately theirfull capacity. in posed of 60 carbon steel, the disks being cutting offmachines and thelike and. hence from about one quarter to about sevensixit has been heretofore impossible to gain the teenths of an inch inthickness, although of full utility and advantage of such cutters courseI do notso limit my invention, as the for the purpose of rapidlyandeconomically thickness of the flat metal blade or disk will severingmetal bars and the like. g 7 1 depend on the work to be performed, the

Heretofore, it has been proposed to cut diameter of the blade and thediameter of saw teeth around the edge of a central openthe central workreccivingopening thereof.

ingin a peripheral-driven disk to perform In the. specific exampleillustrated, I show the functions of ahack saw for cutting tubes thediskor blade withits front and rear side and small or soft stock butsuch devices to faces parallel with the blade beveled off cirthebest ofmy information and belief never cumferentially around its edge portionat went into use because. of the. inefficiency, the front face thereof,and adjacent to its slowness cost thereof as compared with periphery orouter edgeprovided with a surthe cheap power hack saws and the smallinrounding series of uniformly spaced trans: expensive saw bladesthereof. verse holes 4, countersunk to receive secur- Center drivenrotary" saws having high ingscrews and alternating with perform speedsteel insertible teeth wedged in pocktions 5, to receive studs or pinsrigidwith of the drum and cutter blade or disk to rocenter and hold theblade or disk.

7, is a strong heavy metal drum in the form of an open end cylinder andat its front end edge 8, formed to receive the rear fiat face of theblade or disk and have the same secured removably thereto by the machinescrews 9, passed through countersunk holes 4, and by the pins or studs10, rigid with and projecting from the drum edge and fitting into theperforations 5, to properly The arrangement is such that the disk can bemost accurately and rigidly secured to the drum, yet so that the diskcan be readily removed from the drum when necessary. The drum isexternally finished and formed to assume a horizontal position androtate in suitable strong boxes or bearing surrounding the same andcarried by or forming a part of a suitable movable feed carriage.

Suitablemeans are provided at the exterior tate'the drum at the desiredrate of speed while the feed carriage is being moved to carry the bladethrough the work at the desired high rate of speed. In the specificexample illustrated, I show the drum driving gear wheel 11,concentrically fitted on the exterior of the drum about midway betweenits ends and securely keyed or otherwise'fastened thereon in such amanner that the driving gear is concentric with the cen-- and to oneside of the vertical diameter of the gear. This pinion is suitablymounted in the feed carriage that carries the drum and 1s drlven 1n anysuitable manner from any suitable source of power.

The disk or blade 1, is provided with any suitable high duty cuttersarranged around its central opening and these cutters are rigidly lockedor affixed thereto 1n any sultable manner so as to be renewable orremovable therefrom. i

i In the particular embodiment shown in the drawings, for the purpose ofillustrating an example, I show the blade formed with a series ofsimilar uniformly spaced pockets 13, arranged around and opening intothe central work-receiving opening, and receiving an old form of highspeed cutters now found on the market. I do not claim to be the inventorof the cutters per 86, shown in the drawings but merely show such oldcutters of commerce for convenience of illustration. V

The cutters 14, illustrated have projecting points 15, and are tightlylocked in the pockl ets 13, by wedges 17, and carry screws 16'to bearagainst the floors or abutments of the pockets, but I do not wish tolimit my in- ,cutters. V

ploy a considerably less numberof cutters than in the old type of saw,and there is no I 120 v V as inthe old type of saw,tending toknockvention thereto, as I claim to be the first to ually wedged inpockets or are otherwise locked or secured to the blade against lateraldeflection and supported to'sustain the tremendous thrust of'the'cutterswhile at work. The cutting or working edge portions 15,

of all the cutters are composed of what is known as high speed steel, orhigh duty cutters, that is cutters composed of metal such assteel ofsuch composition or so treated as to-b'e capable of cutting'hard metal,such as steel, at'an'exceedingly high rate of speed without fusing orlosing 1n efiiciency. In other words, I employ radially arrangedconverging cutters, the working 7 portions of which are composed of. ametal that willretain its cutting efficiency at high temperatures; sothat Ican feed my disk at thehighest possible speed through the work,even though the work be a steel bar, while rotating the disk at thedesired rate of speed to sever the work in the shortest possiblelength'of time. p y a In "my saw, the blade is fastened entirely aroundits periphery, its strongest portion,

and is driven from'its periphery, and I arrange the cutters radially andconverging at a central opening in theblade so thatI secure anexceedinglypowerful leverage on each cutter while at work and canoperate" the cutters at an exceedingly highfrateof speed without chatteror vibration of the blade and without danger of the cutters flying fromthe blade under centrifugal action. In fact, with my blade I have out.through six inch steel bars,. one after the other, in.

less than sixty seconds each, and without 7 tightly as desired withoutcausing the slightest deflection or distortion of the blade and awithout loosening adjacent cutters, but on" the contrary, thepropertightening of cut-.

ters in my blade tendslt o tighten adjacent Furthermore in my blade, Iemlateral deflection of the blade while at work,

the cutters loose fromtheir pockets, particularly in view of thefactthat every alterintervening cutter edges narrow,

What I cla1m 1s .nate cutting edge isvusually wide'with the means andhaving a central work receiving opening wlth pockets at'their inner endsopening into said opening, in combination with cutters adapted to saidpockets and having inner high duty working points within said opening,and means for rigidly looking said cutters to said blade to sustain thethrust thereof in action and whereby said cutters are renderedremovable.

2. In metal cutting off machinery, a blade formed around its outer edgefor securing to high speed rotary driving means and having a centralwork receiving opening, in combination with removable cutters arrangedaround said opening and having converging inner working points therein,and means rigidly locking said cutters to said blade to distribute thethrust of the cutters in action thereon and whereby the cutters arerendered removable.

3. In metal cutting 0E machines, a high speed drive for driving highduty cutters to their capacity comprising an exteriorly driven rotaryblade having a central work receiving opening, in combinationwithrenewable high duty cutters arranged around said opening and havinginner working points within the opening, and means for locking saidcutters to said blade for sustaining the outward thrust thereof while inaction, and whereby said cutters are rendered removable.

4. In metal cutting off machinery, a high speed rotary member having acentral work receiving opening formed with cutter-thrust sustainingabutments around said opening, in combination with high duty cuttersarranged around said openings and having inner working points within thesame, and means for removably locking said cutters to said member andwhereby the thrust of the cutters in action is sustained by said bladethrough said abutments.

In testimony whereof I affix my signature, in presence of two witnesses.

GEORGE GORTON.

Witnesses:

C. R. CARPENTER, C. EILANDSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

